United Airlines Primary Aircraft – B737-700 (73G) Practice Test

The action of activating the Emergency Lighting System is a cabin crew responsibility assigned to the flight attendant who is in charge of the cabin. That person coordinates and handles cabin emergency procedures, including turning on the ELS to illuminate exit paths as needed. On a 73G with three flight attendants, the designated lead flight attendant—Flight Attendant 3—has this duty, so they are the one expected to activate the ELS. The captain’s role is overarching command of the flight, but the actual activation of cabin lighting during an emergency falls to the lead FA. The other flight attendants aren’t assigned this specific trigger in standard procedures, which is why FA3 is the correct choice.